Typical swarm locations
Devonport Park lime avenue and horse chestnut canopy produce reliable June swarms each year. Tamar riverside sycamore and elder below Mount Wise attract clusters on warm May afternoons. Dockyard perimeter wall ivy and elder on Richmond Walk are regularly reported to Plymouth BKA. Older naval terrace chimney stacks and eaves in Albert Road and Ker Street are among the most frequent cavity swarm sites in the district.